Type caster for reference_wrapper

[akoen]

I'd like to bind a c++ function that takes a vector of wrapped objects without calling their copy constructor and explicitly disallowing a null argument.

I can of course use pointers e.g. std::vector<const Type*> but nanobind will happily allow a None argument which I have to explicitly handle internally.

pybind11 defines a type caster for std::reference_wrapper that does (I believe) what I'm looking. Is there similar support in nanobind?

[wjakob]

No such type caster currently exists, but you are welcome to provide a PR that adds this functionality.